2019-05-08 12:47:52 +02:00
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#!/usr/bin/env python
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2011-06-09 12:14:14 +00:00
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"""
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2026-01-01 19:12:07 +01:00
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Copyright (c) 2006-2026 sqlmap developers (https://sqlmap.org)
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2017-10-11 14:50:46 +02:00
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See the file 'LICENSE' for copying permission
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2011-06-09 12:14:14 +00:00
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"""
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import random
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import re
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from lib.core.data import kb
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2019-05-03 13:20:15 +02:00
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from lib.core.datatype import OrderedSet
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2019-06-04 14:44:06 +02:00
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from lib.core.enums import PRIORITY
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2011-06-09 12:14:14 +00:00
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__priority__ = PRIORITY.NORMAL
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2011-07-06 21:04:45 +00:00
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def dependencies():
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pass
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2012-12-03 14:27:01 +01:00
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def tamper(payload, **kwargs):
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2011-06-09 12:14:14 +00:00
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"""
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2018-07-31 01:17:11 +02:00
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Adds multiple spaces (' ') around SQL keywords
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2011-07-06 21:04:45 +00:00
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Notes:
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* Useful to bypass very weak and bespoke web application firewalls
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that has poorly written permissive regular expressions
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2011-06-09 12:14:14 +00:00
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Reference: https://www.owasp.org/images/7/74/Advanced_SQL_Injection.ppt
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2013-03-13 21:57:09 +01:00
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>>> random.seed(0)
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>>> tamper('1 UNION SELECT foobar')
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2019-05-03 13:20:15 +02:00
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'1 UNION SELECT foobar'
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2011-06-09 12:14:14 +00:00
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"""
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retVal = payload
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if payload:
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2019-05-03 13:20:15 +02:00
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words = OrderedSet()
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2011-06-09 12:14:14 +00:00
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2018-02-08 16:49:16 +01:00
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for match in re.finditer(r"\b[A-Za-z_]+\b", payload):
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2011-06-09 12:14:14 +00:00
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word = match.group()
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if word.upper() in kb.keywords:
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words.add(word)
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for word in words:
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2019-05-03 13:20:15 +02:00
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retVal = re.sub(r"(?<=\W)%s(?=[^A-Za-z_(]|\Z)" % word, "%s%s%s" % (' ' * random.randint(1, 4), word, ' ' * random.randint(1, 4)), retVal)
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retVal = re.sub(r"(?<=\W)%s(?=[(])" % word, "%s%s" % (' ' * random.randint(1, 4), word), retVal)
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2011-06-09 12:14:14 +00:00
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2012-10-25 10:10:23 +02:00
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return retVal
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